Unit 1 Day 3

Unit 1 Day 3 

Surface area of prism, pyramid, cylinder, cone, and sphere 

Formulas: 

Prism: area of base + area of sides Pyramid: area of base + area of sides Cylinder: area of base + pi x diameter x height Cone: area of base + pi x radius x slant height Sphere: 4 x pi x radius squared 

Quiz: 

1. Find the surface area of this cylinder:  

[Drawing][Drawing]                      6” 

     8” 

2. Find the surface area of this cone:  

  

     25”  

[Drawing]                    15” 

3.  Find the surface area of this sphere:  

[Drawing][Drawing]     

                 45.6’ 

Answer Key:  

1.  6/2 = 3 squared = 9 x pi = 28.26 x 8 = 226.08” squared 
2. 15/2 = 7.5 squared = 56.25 x pi = 176.625  

Pi x 7.5 = 23.55 x 25 = 588.75  

765.375” squared 

     3.)  4 x pi = 12.56 x radius squared = 6,529.19’ squared